Dietary Reference Values Flashcards
What does DRV stand for?
Dietary Reference Value
What are the purpose of DRVs?
To act as a benchmark
To reflect the nutritional needs of a population
What is the name used to describe the distribution of DRVs?
Gaussian Distribution
What does Gaussian distribution mean?
It is another term for normal distribution, it follows a bell-shaped curve and assumes that any measurement taken from that curve will be normally distributed.
What is the ‘safety margin’ set for DRVs?
The mean value +/- 2.5
Which members of the population do DRVs solely apply to?
Healthy people
What does EAR stand for?
Estimated Average Requirement
What is the estimated average requirement?
It is the value that refers to and meets the needs of 50% of the population
What does LRNI stand for?
Lower Reference Nutrient Intake
What is the lower reference nutrient intake?
The LRNI is the amount of a nutrient that is enough for only a small number of people in a group who have low requirements (2.5%) i.e. the majority need more.
It is 2SD below the EAR
What does RNI stand for?
Reference Nutrient Intake
What is the reference nutrient intake?
The RNI is the amount of a nutrient that is enough to ensure that the needs of nearly all a group (97.5%) are being met.
It is 2SD above the EAR
What is the fourth ‘guideline’ that follows EAR, LRNI, RNI?
Safe and Adequate
What is the Safe and Adequate guideline for?
For nutrients with insufficient evidence to form an EAR, it is to ensure that the levels recommended for consumption are safe
Example: Vitamin K
Observational studies
Balance studies
Clinical Function Tests
Estimates
What are the above all examples of?
The methods by which DRVs are produced